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Civil Engineering :: Building Materials

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Building Materials - Section 5
Building Materials - Section 6
Building Materials - Section 7
Building Materials - Section 8
Building Materials - section-9

  1. The pigment used in paints for corrosive resistance, is

    2. A.

    white lead
    B.

    ferrous oxide
    C.

    zinc white
    D.

    red lead
    E.

    gypsum.

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  2. A well seasoned timber may contain moisture up to
    3. A.

    4 to 6%
    B.

    6 to 8%
    C.

    8 to 10%
    D.
    10 to 12%.

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  3. The stones obtained by blasting are used as

    4. A.

    ballast in railways
    B.

    aggregates for concrete
    C.

    roadmetal
    D.

    All the above.

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  4. Distemper is
    5. A.

    a paint consisting of powdered chalk, pigments, and water
    B.

    a water proofing agent
    C.

    a paint consisting of coloured cement and water
    D.

    a drying agent.

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  5. Oil varnish generally consists of

    6. A.

    synthetic resin and spirit
    B.

    oil, wax and resin
    C.

    resin, oil and turpentine
    D.

    spirit, oil and wax.

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  6. Pick up the correct statement from the following:

    7. A.

    The average crushing strength of hand moulded bricks is 6000 t/m2
    B.

    The average tensile strength of hand moulded brick is 200 t/m2
    C.

    The average shearing strength of hand moulded brick is 600 t/m2
    D.
    All the above.

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  7. The cracks which extend from bark towards the sap wood in the cross section of a tree, are called
    8. A.

    radial shakes
    B.

    star shakes
    C.

    heart shakes
    D.

    cup shakes.

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  8. Sea sand used in structures causes

    9. A.

    dampness
    B.

    efflorescence
    C.

    efflorescence
    D.

    All of these.

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  9. The compound of Portland cement which reacts immediately with water and also sets first is

    10. A.

    Tri-calcium silicate
    B.

    Di-calcium silicate
    C.

    Tri-calcium aluminate
    D.

    Tetra calcium alumino ferrite.

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  10. Refractory bricks resist

    11. A.

    high temperature
    B.

    chemical action
    C.
    dampness
    D.

    all the above.

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